// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_OZONE_PLATFORM_DRM_GPU_DRM_GPU_DISPLAY_MANAGER_H_
#define UI_OZONE_PLATFORM_DRM_GPU_DRM_GPU_DISPLAY_MANAGER_H_

#include <stdint.h>

#include "base/macros.h"
#include "base/memory/scoped_vector.h"
#include "ui/ozone/common/gpu/ozone_gpu_message_params.h"

namespace ui {

class DrmDeviceManager;
class DrmDisplay;
class ScreenManager;

struct GammaRampRGBEntry;

class DrmGpuDisplayManager {
public:
    DrmGpuDisplayManager(ScreenManager* screen_manager,
        DrmDeviceManager* drm_device_manager);
    ~DrmGpuDisplayManager();

    // Returns a list of the connected displays. When this is called the list of
    // displays is refreshed.
    std::vector<DisplaySnapshot_Params> GetDisplays();

    // Returns all scanout formats for |widget| representing a particular display
    // controller or default display controller for kNullAcceleratedWidget.
    void GetScanoutFormats(gfx::AcceleratedWidget widget,
        std::vector<gfx::BufferFormat>* scanout_formats);

    // Takes/releases the control of the DRM devices.
    bool TakeDisplayControl();
    void RelinquishDisplayControl();

    bool ConfigureDisplay(int64_t id,
        const DisplayMode_Params& mode,
        const gfx::Point& origin);
    bool DisableDisplay(int64_t id);
    bool GetHDCPState(int64_t display_id, HDCPState* state);
    bool SetHDCPState(int64_t display_id, HDCPState state);
    void SetGammaRamp(int64_t id, const std::vector<GammaRampRGBEntry>& lut);

private:
    DrmDisplay* FindDisplay(int64_t display_id);

    // Notify ScreenManager of all the displays that were present before the
    // update but are gone after the update.
    void NotifyScreenManager(
        const std::vector<scoped_ptr<DrmDisplay>>& new_displays,
        const std::vector<scoped_ptr<DrmDisplay>>& old_displays) const;

    ScreenManager* screen_manager_; // Not owned.
    DrmDeviceManager* drm_device_manager_; // Not owned.

    std::vector<scoped_ptr<DrmDisplay>> displays_;

    DISALLOW_COPY_AND_ASSIGN(DrmGpuDisplayManager);
};

} // namespace ui

#endif // UI_OZONE_PLATFORM_DRM_GPU_DRM_GPU_DISPLAY_MANAGER_H_
